Expect -6°C daytime maximum temperatures in the shade with on average 3 hours of sunshine per day in Ottawa in January. Check more long-term weather averages for Ottawa in January before you book your next holiday to Ontario in 2018.

Guide to Ottawa weather in January

The average maximum daytime temperature in Ottawa in January is a very cold -6°C (21°F). The average night-time temperature is usually a very cold -16°C (3°F). There are usually 3 hours of bright sunshine each day, which represents 36% of the 9 hours of daylight.

Expect 59mm (2.3 inches) of rainfall across the whole of January with 14 days with some rain falling. Maximum UV levels will be low (1 UV index) at midday when the skies are clear.